Plug in four port USB charger



FIG. 1 is a perspective view of a plug in four port USB charger;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines and the areas within the broken lines shown in FIGS. 1 and 7 depict environmental matter that forms no part of the claimed design. 

CLAIM The ornamental design for a plug in four port USB charger, as shown and described. 